S6 Egde+ SM-G925W8 5.1.1. how to unlock

S6 Egde+ SM-G925W8 5.1.1. how to unlock requires root how root pls guide me thxxxxxxxx i confuse how to root method 

 S6 Egde+ SM-G925W8

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Maybe your solution is here...
How to Root Galaxy S6 Edge Plus (SM-G928C/I/S/K/L)

Here is your kernal Download GalaxyS6/kernels/unibase/S6-UniBase_BOG8_v2.tar at DownloadAndroidROM.com
Remember first allow oem unlock from dev option

International S6 Edge Plus: G928F, G928I, G928C, G928L, G928K, G928S:
https://www.androidfilehost.com/?fid=24052804347808951
T-Mobile S6 Edge Plus G928T and one other G928W8 variant:
https://www.androidfilehost.com/?fid=24052804347808952 

help me


Operation: Unlock
Selected model: SM-G925W8
Software version: 23.8
Waiting ADB device... OK
Reading phone info...
Model: SM-G925W8
Android version: 5.1.1
Product code: SM-G925WZDABMC
Phone version: G925W8VLU3BOK1
PDA version: G925W8VLU3BOK1
CSC version: G925W8OYA3BOK1
CSC country code: Canada
CSC sales code: BMC
HW version: REV0.1
Phone S/N: R58G612Q5JY
Modem board: SHANNON333
RF cal date: 20150613
IMEI:
Checking Super user right... true
Initializating zTool... OK
Running zTool, please wait... error (7.7.8)
Done with Samsung Tool PRO v.23.8V

m7cdtu flash file problem

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(bootloader) version: 0.5
(bootloader) version-bootloader: 2.49.0000
(bootloader) version-baseband: T3.16.1229.31
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 5.15.1403.32
(bootloader) version-misc: XB SHIP S-OFF
(bootloader) serialno: HT336W900171
(bootloader) imei: 355867050055557
(bootloader) meid: 00000000000000
(bootloader) product: m7cdtu
(bootloader) platform: HBOOT-8064
(bootloader) modelid: PN0780000
(bootloader) cidnum: 11111111
(bootloader) battery-status: good
(bootloader) battery-voltage: 3765mV
(bootloader) partition-layout: Generic
(bootloader) security: off
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-1f512bb6
(bootloader) hbootpreupdate: 11
plz give me working flash file link